Description
The Rock River Arms LAR-15 Mid-Length A4 AR-15 5.56/223 16″ Barrel Mid Length 30 Rd Mag is a classic, no-frills AR-15 carbine built to a solid standard. It’s a reliable, accurate, and straightforward rifle that focuses on core functionality over flashy extras, making it a fantastic value for a dependable workhorse. I’ve put several hundred rounds of mixed brass and steel-case through one, and it just runs.
Key Features
- Mid-Length Gas System: Smoother recoil impulse and less wear on internal parts compared to a carbine-length system on a 16-inch barrel.
- Classic A4 Configuration: Flat-top upper receiver with a removable carry handle for ultimate optic or iron sight flexibility.
- Chrome-Lined Barrel: Provides excellent durability, corrosion resistance, and easier cleaning. The 1:9 twist rate handles a wide range of common 55-62 grain .223 and 5.56 ammo.
- Mil-Spec Compatibility: This rifle is built to standard dimensions, meaning a huge universe of AR-15 parts and accessories will fit. Think Magpul furniture, Geissele triggers, or a vast array of optics.
- Rock River Arms 2-Stage Trigger: A notable step up from a standard mil-spec single-stage, offering a cleaner, more predictable break for better accuracy.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | 5.56 NATO / .223 Remington |
| Barrel Length | 16 Inches |
| Gas System | Mid-Length |
| Twist Rate | 1:9 |
| Magazine Capacity | 30 Rounds (1 included) |
| Overall Length | Approx. 34.5 Inches (stock extended) |
The rifle comes with a six-position collapsible stock, a standard A2 pistol grip, and that removable carry handle with dual aperture sights. The handguards are classic round, two-piece units—perfectly functional and easy to replace if you want to add a rail section or swap to a free-float system later. At a weight of around 6.8 pounds unloaded, it’s a very manageable platform. Here’s the thing—for $751.90, you’re getting a complete rifle from a respected manufacturer known for in-house quality control, not just assembled from a bin of anonymous parts.
Who This Rifle Is For
This LAR-15 is ideal for the shooter who wants a dependable, accurate first AR-15 without breaking the bank, or the seasoned owner looking for a solid spare rifle or a base for a custom build. It’s for the person who appreciates proven design and wants a tool that’s drop-in ready for a wide range of uses—from range training and introductory courses to home defense or casual competition. It’s also a great choice for Missouri hunters looking for a versatile varmint or predator rig.
Pros & Cons
Pros: The mid-length gas system is a huge plus for shootability and longevity. The included two-stage trigger is a genuine value-add you don’t always see at this price. Rock River’s reputation for solid barrels and proper headspacing means you’re getting inherent accuracy. Its mil-spec DNA means endless customization is simple. It’s available at firearms-missouri.com for Missouri residents and nationwide.
Cons: The classic handguards can get hot during extended firing strings and don’t offer built-in rail space. The A2 grip and basic stock are functional but are often the first things upgraders change. The 1:9 twist, while great for common ammo, may not stabilize the very heaviest (77+ grain) .223 projectiles as well as a 1:7 or 1:8 barrel would.
Frequently Asked Questions
Q: Is this a true 5.56 NATO chamber, and can I safely shoot .223 Remington in it?
A: Yes. Rock River Arms chambers these barrels for 5.56 NATO, which has higher pressure specifications. You can safely fire both 5.56mm and .223 Remington ammunition in this rifle. The reverse is not always true—firing 5.56 in a .223-chambered rifle can be dangerous.
Q: What kind of accuracy can I expect?
A: With quality 55-grain FMJ ammunition, you should consistently see 1.5 to 2.5 MOA groups from a bench rest. Using match-grade 62 or 69-grain ammo, many shooters find these rifles capable of sub-MOA performance. The two-stage trigger and solid barrel are a great foundation for precision.
Q: Are Magpul PMAGs compatible with this rifle?
A: Absolutely. This rifle uses standard STANAG pattern magazines. Magpul PMAGs, USGI aluminum mags, Lancers, and most other common AR-15 magazines will work flawlessly. The rifle ships with one 30-round magazine.
If you’re after a straightforward, well-built AR-15 that gets the fundamentals right and leaves room for you to make it your own, this Rock River Arms model deserves a close look.
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